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Dynamic Response Analysis Method of Saturated Soil-Pile Group-Superstructure System

A dynamic response and analysis method technology, applied in special data processing applications, complex mathematical operations, geometric CAD, etc.

Active Publication Date: 2022-04-22
BEIJING UNIV OF TECH
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In the domestic and foreign published patent and non-patent literature retrieved this time, there is no report with the same content as the overall research and development of this project

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  • Dynamic Response Analysis Method of Saturated Soil-Pile Group-Superstructure System
  • Dynamic Response Analysis Method of Saturated Soil-Pile Group-Superstructure System
  • Dynamic Response Analysis Method of Saturated Soil-Pile Group-Superstructure System

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Embodiment Construction

[0278] 1.1 Mechanical model and basic assumptions

[0279] Computational models such as figure 1 In the column coordinate system shown, an i×j-type pile group and a superstructure are connected by a rigid cap, and the saturated soil around the pile constitutes a saturated soil-pile group-superstructure interaction system. In addition, the base of the pile and saturated soil is tightly connected to the rigid bedrock, which is Vertical movement in the form of ( and ω is the circular frequency). The material parameters of saturated soil and structure are shown in Table 1.

[0280] Table 1 Soil and structural material parameters

[0281]

[0282]

[0283] 1.2 Saturated soil motion equation and solution

[0284] Using Boer porous media theory to describe the dynamic behavior of saturated soil, the equation of motion is

[0285]

[0286]

[0287]

[0288] where S v =n f ρ f g / k f is the liquid-solid coupling coefficient of the soil; u s and u f represent...

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Abstract

The invention relates to a dynamic response analysis method for a saturated soil-pile group-superstructure system, and belongs to the technical field of pile foundation mechanics analysis. His de Boer's porous media theory based on the continuum mixture axiom and the concept of volume fraction, using the concept of volume fraction, several microscopic properties can be directly described by macroscopic properties, and the complicated formulas in the hybrid mixture theory are avoided. The porous media theory established by de Boer not only conforms to the principles of continuum mechanics and thermodynamics, but also has many advantages that Biot's theory does not have. In addition, the research on pile-soil-superstructure dynamic interaction is limited to the case of single-phase soil, and rarely involves saturated soil. Due to the existence of the liquid phase, the propagation and dissipation of energy and waves in saturated soil and single-phase soil are different, and the filtering and amplification effects of the soil layer on the seismic wave under the seismic load will have different effects on the seismic response characteristics of the structure. great practical significance.

Description

technical field [0001] The invention relates to a dynamic response analysis method of a saturated soil-pile group-superstructure system, in particular to a dynamic response analysis method of a saturated soil-pile group-superstructure system under the vertical movement of bedrock, and belongs to the technical field of pile foundation mechanics analysis . Background technique [0002] At present, in actual engineering, pile foundations mostly appear in the form of pile groups. In this case, the influence of "pile group effect" must be considered. Pile groups are often used to support the superstructure, so saturated soil, pile groups, and superstructure constitute an interactive system rich in research significance. Moreover, in addition to the common direct load, the load it receives will also be affected by ground motion in some cases. According to the retrieval, most of the studies on saturated soil-pile dynamic interaction are carried out based on the Biot saturated soi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/20G06F17/10G06F119/14
CPCG06F30/13G06F2119/06
Inventor 许成顺崔春义张石平梁志孟孟坤
Owner BEIJING UNIV OF TECH
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